/**
 * Created by lishida on 2017/1/3.
 */
*{
    margin: 0;
    padding: 0;
}
.ul{
    list-style: none;
}

.ul li{
    float: left;
    width: 100px;
    height: 40px;
    line-height: 40px;
    margin-left: 20px;
}

.ul li:hover{

}

div{
    width: 340px;
    height: 200px;
    border: 1px solid red;
    position: absolute;top: 40px; left: 20px;
    display: none;
}

.block{
    display: block;
}

.active{
    background-color: red;
}
